/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.preference;

import com.example.android.apis.R;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.LinearLayout.LayoutParams;

/**
 * Demonstrates launching a PreferenceActivity and grabbing a value it saved.
 */
public class LaunchingPreferences extends Activity implements OnClickListener {

	private static final int REQUEST_CODE_PREFERENCES = 1;

	private TextView mCounterText;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		/*
		 * These preferences have defaults, so before using them go apply those
		 * defaults. This will only execute once -- when the defaults are
		 * applied a boolean preference is set so they will not be applied
		 * again.
		 */
		PreferenceManager.setDefaultValues(this, R.xml.advanced_preferences,
				false);

		// Simple layout
		LinearLayout layout = new LinearLayout(this);
		layout.setOrientation(LinearLayout.VERTICAL);
		setContentView(layout);

		// Create a simple button that will launch the preferences
		Button launchPreferences = new Button(this);
		launchPreferences
				.setText(getString(R.string.launch_preference_activity));
		launchPreferences.setOnClickListener(this);
		layout.addView(launchPreferences, new LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

		mCounterText = new TextView(this);
		layout.addView(mCounterText, new LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

		updateCounterText();
	}

	public void onClick(View v) {

		// When the button is clicked, launch an activity through this intent
		Intent launchPreferencesIntent = new Intent().setClass(this,
				AdvancedPreferences.class);

		// Make it a subactivity so we know when it returns
		startActivityForResult(launchPreferencesIntent,
				REQUEST_CODE_PREFERENCES);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);

		// The preferences returned if the request code is what we had given
		// earlier in startSubActivity
		if (requestCode == REQUEST_CODE_PREFERENCES) {
			// Read a sample value they have set
			updateCounterText();
		}
	}

	private void updateCounterText() {
		// Since we're in the same package, we can use this context to get
		// the default shared preferences
		SharedPreferences sharedPref = PreferenceManager
				.getDefaultSharedPreferences(this);
		final int counter = sharedPref.getInt(
				AdvancedPreferences.KEY_MY_PREFERENCE, 0);
		mCounterText.setText(getString(R.string.counter_value_is) + " "
				+ counter);
	}
}
